The inner diameter of a well is 4.2m and its depth is 10m. Find the inner surface area of the well . find the cost of plastering it from inside at the rate rupee 52 per square metre
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tsa of a right circular cylinder = 2 pi r(r+h)
= 2 * 22/7 *21/10* (21/10+ 10 )
=13.2 * 12.1
=159.72 square meters
total cost = 159.72 * 52
=8305.44 rs
= 2 * 22/7 *21/10* (21/10+ 10 )
=13.2 * 12.1
=159.72 square meters
total cost = 159.72 * 52
=8305.44 rs
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